... Up to four unique key sets may be used for these operations. The AT88SC0204CA offers the ability to communicate with virtually any smart card reader using the asynchronous protocol (Gemplus Patent) defined in ISO 7816-3. ...

... The AT88SC0204CA provides an ISO 7816-3 compliant asynchronous answer-to-reset (ATR) sequence. Upon activation of the reset sequence, the device outputs bytes contained in the 64-bit ATR register. An internal pull-up on the RST input pad allows the device to operate in synchronous mode without bonding RST. The AT88SC0204CA does not support an ATR sequence in the synchronous mode of operation. ...

... SDA/IO Output High Current OH I SDA/IO Output Low Current OL Note prevent latch up conditions from occurring during power up of the AT88SC0204CA, V before applying Notice: Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other condition +0 ...

... Cryptographic Message Authentication Codes AT88SC0204CA implements a data validity check function in the standard, authentication or encryption modes of operation. In the standard mode, data validity check is done through a Modification Detection Code (MDC), in which the host may read an MDC from the device in order to verify that the data sent was received correctly. ...

... Gaining access to the configuration memory requires successful presentation of a secure (or transport) code. The initial signature of the secure (transport) code for the AT88SC0204CA device is $E5 47 47. This is the same as the Write 7 password. The user may elect to change the signature of the secure code anytime after successful presentation. ...